منابع مشابه
ANTIBACTERIAL ACTIVITY OF MARSILEA QUADRIFOLIA Linn
Four Leaf Clover'or aalaik keerai in Tamil is in use for more than 3000 years as part of food. It is a pteridophytic plant that is marketed and used by tribals of Eastern India as a nerve relaxant and curative agent due to its nutritional value. In the present study M. quadrifolia leaf extracts have showed effective inhibition against gram negative bacteria such as Salmonella typhi, Pseudomonas...
متن کاملThe University of Maryland College Park, Maryland
Question 2 (25 points) Consider the problem of minimizing the cost of producing some output level Y . The firm uses two inputs, labor (L) and capital (K), which can be combined to produce goods according to the production function f (L,K) = LαK1−α, α ∈ (0, 1). The effective amount of labor that is used in production is determined as L = l× t, where l is the number of workers hired, and t is the...
متن کاملSpermiogenesis in the fern Marsilea microtubules, nuclear shaping, and cytomorphogenesis.
Spermiogenesis in Marsilea is a complex series of events, including the formation of a helically wound organelle coil. The coil begins to appear in early development when a multilayered structure (MLS) is formed de novo in association with a mitochondrion. The outermost layer of the MLS is a ribbon of microtubules. As the microtubules grow out from the MLS, they grow along the nuclear envelope....
متن کاملThe fine structure of fertilization in the fern Marsilea vestita.
The ultrastructural details of fertilization in the fern Marsilea vestita, including gamete approach and fusion, the fate of the spermatozoid organelles and the development of a possible block to polyspermy are described. The spermatozoid approaches the egg through layers of mucilage that surround the megaspores. It moves down the neck of the archegonium into the cavity above the egg. In order ...
متن کاملMago nashi is essential for spermatogenesis in Marsilea.
Spermatogenesis in Marsilea vestita is a rapid process that is activated by placing dry microspores into water. Nine division cycles produce seven somatic cells and 32 spermatids, where size and position define identity. Spermatids undergo de novo formation of basal bodies in a particle known as a blepharoplast. We are interested in mechanisms responsible for spermatogenous initial formation. M...
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ژورنال
عنوان ژورنال: American Fern Journal
سال: 2008
ISSN: 0002-8444,1938-422X
DOI: 10.1640/0002-8444(2008)98[176:mmim]2.0.co;2